Everyone's ears are different and it is a completely subjective thing.
I'm an audio engineer and believe me, you can get a lot worse. These are actually quite decent for the price (free). They rival my Zune Premium Earbuds (30 dollars), but don't come close to my Sennheiser or Sony monitoring headphones (obviously). These outclass the Apple earbuds, and are definitely more balanced than anything in the Beats (ugh, terrible product) line.
Bottom line, these are better than pretty much any stock earbud-in-the-box-of-a-phone. Haven't heard the ReZound buds, but since it's Beats, I'd imagine they cost 10 dollars to make and are made in a sweatshop somewhere in China.
Besides people, they are free. Are we really complaining about free earbuds?